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  2. Hospital Sisters Health System - Wikipedia

    en.wikipedia.org/wiki/Hospital_Sisters_Health_System

    Website. hshs.org. Hospital Sisters Health System, or HSHS, is a non-profit healthcare system headquartered in Springfield, Illinois. HSHS operates a network of 15 hospitals and other healthcare facilities throughout the midwestern U.S. states of Illinois, and Wisconsin. HSHS also operates St. John's College, the oldest Catholic hospital based ...

  3. Halogen lamp - Wikipedia

    en.wikipedia.org/wiki/Halogen_lamp

    A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine. The combination of the halogen gas and the tungsten ...

  4. Metal-halide lamp - Wikipedia

    en.wikipedia.org/wiki/Metal-halide_lamp

    A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides [1][2] (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp. [1] Developed in the 1960s, they are similar to mercury vapor lamps, [1] but ...

  5. The Best Lighting For Chronic Migraine - Healthline

    www.healthline.com/health/migraine/lightbulbs...

    Halogen lightbulbs. These bulbs, like LEDs, do not flicker. They also emit a warm light that may be more soothing if you have chronic migraine. Halogen lightbulbs are very bright and may be useful ...

  6. Timeline of lighting technology - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_lighting...

    19th century. 1800–1809 Humphry Davy invents the arc lamp when using Voltaic piles (battery) for his electrolysis experiments. 1802 William Murdoch illuminates the exterior of the Soho Foundry with gas. 1805 Philips and Lee's Cotton Mill, Manchester was the first industrial factory to be fully lit by gas. 1809 Humphry Davy publicly ...

  7. High-intensity discharge lamp - Wikipedia

    en.wikipedia.org/wiki/High-intensity_discharge_lamp

    High-intensity discharge lamp. High-intensity discharge lamps (HID lamps) are a type of electrical gas-discharge lamp which produces light by means of an electric arc between tungsten electrodes housed inside a translucent or transparent fused quartz or fused alumina arc tube. [1] This tube is filled with noble gas and often also contains ...

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